Ochoa Ob-3 Process Water Storage Lagoon is an earth dam located in Adams County, Washington, built in 2009. It carries a High hazard potential classification and has a fair condition assessment.
Dam profile
NID height · 32 ft32 ft tall and 2,000 ft long, taller than 74% of U.S. dams with a recorded height. Height is drawn to scale against a two-story house, about 25 ft; the profile is a generic embankment section and the water level is illustrative.
About Ochoa Ob-3 Process Water Storage Lagoon
Ochoa Ob-3 Process Water Storage Lagoon is a dam in Adams, Washington. The dam is owned by Ob-3 Resource Management LLC (private). It impounds the Offstream Drains Tolind Coulee near Warden.
The dam stands 32 feet tall and stretches 2,000 feet across, creates a reservoir covering 16 acres, and has a maximum storage capacity of 361 acre-feet. Completed in 2009, the structure is relatively new.
This dam carries a high hazard potential classification, which means that a failure or uncontrolled release of water would likely cause loss of human life. This classification reflects the consequences of failure, not the likelihood — it indicates that people live or work in the area downstream. Its condition is rated fair — the dam has minor deficiencies that are being addressed or do not pose an immediate safety threat. An emergency action plan is in place for this dam. The most recent inspection on record was 08/10/2020.
Living Downstream
If you live or work downstream of this dam, consider taking these steps: learn your local evacuation routes, check whether your county emergency management office has a dam failure inundation map, and sign up for local emergency alerts. The Washington dam safety program can provide more specific information about emergency planning for this structure.
Search for dams near your address to see all dams in your area with hazard classifications and safety data.
Location
| State | Washington |
| County | Adams |
| Nearest City | Warden |
| River/Stream | Offstream Drains Tolind Coulee |
| Coordinates | 46.99933, -118.91411 |
Physical Characteristics
| Dam Type | Earth |
| NID Height | 32 ft |
| Dam Length | 2,000 ft |
| Year Completed | 2009 (17 years old) |
Storage & Hydraulics
| NID Storage | 361 acre-ft |
| Max Storage | 361 acre-ft |
| Normal Storage | 306 acre-ft |
| Surface Area | 16 acres |
| Max Discharge | 436 cfs |
Ownership & Safety
| Purpose | Other |
| Owner | Ob-3 Resource Management LLC |
| Owner Type | Private |
| Hazard Classification | High |
| Condition Assessment | Fair |
| Last Inspection | 08/10/2020 |
| Emergency Action Plan | Yes |
Identifiers
| NID ID | WA00718 |
| Federal ID | WA00718 |
| More Info | State Dam Safety Program |